Currently, ME is diagnosed by ruling out other illnesses, a lengthy process that can take years for patients.
Researchers at the University of Edinburgh compared blood samples from ME patients and healthy individuals, identifying 116 "biomarkers" linked to chronic inflammation, insulin resistance, and liver dysfunction.
This breakthrough challenges the perception that ME is psychological, with Professor Chris Ponting stating that evidence is visible in patients' blood.
While promising, the research is still in its early stages, and further work is required before a definitive diagnostic test can be guaranteed.